Blender

ABSTRACT

A blender includes a container body in which food is accommodated, a main body provided underneath the container body and supporting the container body, a container lid detachably mounted on an upper surface of the container body and opening and closing the top of the container body, and a blade assembly provided on a lower end portion of the container body and chopping the food inside the container body into small pieces. The blade assembly includes a main blade on which a plurality of main blade portions is formed, and an auxiliary blade of which an auxiliary blade portion is positioned between each of the plurality of main blade portions.

TECHNICAL FIELD

The present disclosure relates to a blender and, more particularly, to a blender including two types of blades.

BACKGROUND

Generally, a blender is also referred to as a mixer. The blender is used primarily to chop food accommodated in a container body into small pieces or mix the food by rotating a blade by a rotational force of a motor.

In a normal blender, a main body into which the motor operating by electricity is located is positioned below, and a container body in which the food is accommodated is seated on top of the main body. A blade for chopping the food into small pieces or mixing the food is provided inside the container body and is rotated by a rotational force generated by the motor.

After the food that needs to be chopped into small pieces is put into the container body, an operational button or a knob of the main body is used to drive the motor. The blade is rotated by the rotational force generated by the motor, and thus the food inside the container body is chopped into small pieces or mixed.

In recent years, various blenders of this type have been developed to satisfy the user's need for food intake in their busy everyday life. For example, small-sized hand-held blenders or large-sized high-volume blenders have been developed, and blenders capable of chopping food at a high speed have also been developed.

However, when a container body structure or a blade structure in the related art is employed, it takes a long time to chop the food into small pieces, and the food is not properly chopped into small pieces. Furthermore, a high load is applied to a motor.

For example, a cutter for a mixer is disclosed in Korean Patent No. 10-1219753. In the related art, two cutters (blades) are formed symmetrically in the leftward-rightward direction and are mounted horizontally.

Therefore, the cutters (blades) are rotated in a state of being in parallel with a bottom surface of a container body. Thus, only the food positioned in a lower portion of the container body is chopped into small pieces in a concentrated manner. Accordingly, the entire food is not properly chopped into small pieces. Consequentially, it takes a long time to completely chop the food into small pieces.

Korean Patent No. 10-1384979 discloses a blade that provides an improved performance over the cutter described above. That is, four blades are provided, two in the forward-backward direction and two in the leftward-rightward direction. The four blades are mounted in the downward direction, as well as in the horizontal direction. However, in this structure, a space where the blades chop the food into small pieces is also limited. Therefore, it takes a considerable amount of time to completely chop the food into small pieces and mix the food.

Furthermore, a bottom surface of the container body is kept flat in the horizontal plane, and thus food sticks to the bottom surface without moving. That is, the food sticks to the bottom surface and is brought into contact with the bottom surface by a frictional force. Thus, while the blades rotates, the food is not well separated from the bottom surface due to the frictional force, thereby increasing the load on the motor.

In order to prevent the food from sticking to the bottom surface of the container body, WIPO Publication No. WO 2014/071994 A1 and U.S. Pat. No. 8,834,015 B2 disclose a structure of a blender where a container body and a blade assembly are inclined or a groove is formed in the bottom surface of the container body in a manner that is roundly cut inward therefrom.

An advantage with this structure is that the food is less frequently stuck to the bottom surface of the container body than in the related art. However, the blade has a radius of curvature that corresponds to the bottom surface of the container body. Thus, as is the case with a container body in the related art that has a flat bottom surface and the blade in the horizontal plane, a portion of the blade that chops the food into small pieces is limited. That is, in most cases, the food is chopped into small pieces in a lower end portion of the container body, and thus the efficiency of chopping the food into small pieces is decreased.

In addition, in the related art, a groove is formed in the bottom surface of the container body in a manner that is roundly cut inward therefrom. Thus, a food accommodation space is relatively reduced because the entire lower end portion of the container is not utilized as a space where the food is accommodated.

SUMMARY

An objective of the present disclosure, which is made to solve the problems in the related art as described above, is to provide a blender including an auxiliary blade, as well as a main blade.

Another objective of the present disclosure is to provide a blender including an auxiliary blade of which a blade portion is positioned between each of the main blades.

Still another objective of the present disclosure is to provide a blender capable of reducing load that is applied on a motor by a blade assembly.

Still another objective of the present disclosure is to provide a blender capable of preventing food from sticking to a bottom surface of a container body.

Still another objective of the present disclosure is to provide a blender capable of maximally utilizing a space inside a container body and improving the efficiency of chopping food into small pieces.

Technical Solution

A feature of a blender according to the present disclosure that accomplishes the above-described objectives is an auxiliary blade that is provided in addition to a main blade chopping food into small pieces. Therefore, the efficiency of chopping the food into small pieces is improved.

Another feature of a blender according to the present disclosure that accomplishes the above-described objectives is an auxiliary blade portion of the auxiliary blade that has a smaller length than a main blade portion of the main blade.

According to the present disclosure, a smaller number of the auxiliary blade portions are provided than the main blade portions. Therefore, the food of which one portion is first chopped into small pieces by the auxiliary blade portion is completely chopped into small pieces by the main blade portions. Thus, the load on a motor is reduced, and the food is quickly chopped into small pieces.

Still another feature of a blender according to the present disclosure that accomplishes the above-described objectives is the auxiliary blade portion of the auxiliary blade that extends at a greater inclination angle upward than the main blade portion of the main blade.

According to the present disclosure, a reinforcement portion is formed on edges of a sidewall and a bottom plate of a container body, the edges being brought into contact with each other. Therefore, the food is prevented from sticking to a bottom surface of the container body.

According to an aspect of the present disclosure, there is provided a blender including: a container body in which food is accommodated; a main body provided underneath the container body and supporting the container body; a container lid detachably mounted on an upper surface of the container body and opening and closing the top of the container body; and a blade assembly provided on a lower end portion of the container body and chopping the food inside the container body into small pieces, wherein the blade assembly includes a main blade on which a plurality of main blade portions is formed; and an auxiliary blade of which an auxiliary blade portion is positioned between each of the plurality of main blade portions.

In the blender, the auxiliary blade portion may have a smaller length than the main blade portion.

In the blender, a smaller number of the auxiliary blade portions may be provided than the main blade portions.

In the blender, the main blade may include a main fixation portion combined with a blade shaft and a plurality of main blade portions formed on the main fixation portion in such a manner as to protrude outward therefrom, and the auxiliary blade may include an auxiliary fixation portion combined with the blade shaft and a plurality of auxiliary blade portions formed on the auxiliary fixation portion in such a manner as to protrude outward therefrom.

In the blender, an even number of the main blade portions and an even number of the auxiliary blade portions may be provided.

In the blender, four main blade portions may be formed on the main fixation portion in such a manner as to protrude radially therefrom and may be symmetrically formed on the main fixation portion in such a manner as to be equiangular with respect to the center thereof.

In the blender, two auxiliary blade portions may be formed on the auxiliary fixation portion in such a manner as to protrude outward therefrom and be symmetrical with respect to each other.

In the blender, the main blade portion may be formed on the main fixation portion in such a manner as to be parallel therewith or in such a manner as to make a predetermined angle therewith.

In the blender, the auxiliary blade portion may extend at a predetermined inclined angle upward from an end portion of the auxiliary fixation portion.

In the blender, an angle between the auxiliary blade portion and the auxiliary fixation portion may be smaller than an angle between the main blade portion and the main fixation portion.

In the blender, the blade assembly may include a blade shaft from which the main blade and the auxiliary blade rotate, a body mounted underneath the container body and rotatably supporting the blade shaft, and a fixation cap fastened to the blade shaft and fixing the main blade and the auxiliary blade to the blade shaft.

In the blender, the body may include a seating portion fixedly mounted on a bottom surface of the container body and a protrusion portion formed on an upper surface of the seating portion and exposed in a manner that protrudes upward from the bottom surface of the container body.

In the blender, a key pocket may further be formed in the seating portion. A portion of the bottom surface of the container body is inserted into the key pocket, thereby holding the body in place.

In the blender, a connection portion may be provided on a lower end portion of the blade shaft. The connection portion moves in conjunction with a motor assembly, and thus serves to transfer a rotational force generated by the motor assembly.

In the blender, a fastening plate on which the main blade and the auxiliary blade are mounted and a fastening shank to which the fixation cap is fastened may be provided on an upper end of the blade shaft.

In the blender, a fastening hole in which the fastening plate is accommodated may be formed in respective center portions of the main blade and the auxiliary blade in a manner that passes through the respective center portions thereof from top to bottom.

In the blender, the fastening hole may be formed in such a manner as to have a shape corresponding to a shape of an external surface of the fastening plate. Thus, with this configuration, rotation of the blade shaft rotates the main blade and the auxiliary blade.

In the blender, the fixation cap may be fastened by a bolt-nut mechanism to the fastening shank.

In the blender, the container body may include an outer container body that provides an exterior appearance thereof and an inner container body that is positioned inside the outer container body. The main blade and the auxiliary blade may be positioned inside the inner container body.

In the blender, the container body may include a sidewall having a circular flat cross section; and a bottom plate connected to a lower surface of the sidewall, wherein a reinforcement portion may be formed on edges of the sidewall and the bottom plate, the edges being brought into contact with each other.

In the blender, an internal surface of the reinforcement portion is an inclined surface that is inclined at a predetermined slope angle. With the configurations described above, the food is prevented from sticking to the container body and then being fixed thereto.

Advantageous Effects

A blender according to the present disclosure provides the following effects.

Firstly, according to the present disclosure, in addition to a main blade, an auxiliary blade is further provided on a blade assembly that chops food into small pieces. Therefore, the food is twice chopped into small pieces and is mixed: the first time by the auxiliary blade and the second time by the main blade. Thus, the advantage of improving the efficiency of chopping the food into small pieces is provided.

Secondly, according to the present disclosure, a blade portion of the auxiliary blade is positioned between each of the blade portions of the main blade. Therefore, the food inside a container body sequentially collides with the blade portion of the auxiliary blade and the blade portion of the main blade, and thus is chopped into small pieces. Thus, the advantage of reducing load on a motor assembly is provided. That is, the effect of chopping the food into small pieces and mixing the food under much less load than when the food is chopped one time into small pieces and is mixed is achieved.

Thirdly, according to the present disclosure, the auxiliary blade portion of the auxiliary blade is configured in such a manner as to have a smaller length than the main blade portion of the man blade.

Therefore, the food of a predetermined size is first positioned between each of the main blade portions, and a portion of the food is chopped into small pieces by the auxiliary blade portion. Then, the entire food is chopped into small pieces by the main blade portion, or more portions of the food are chopped into pieces than when chopped into small pieces by the auxiliary blade portion.

When the food is chopped into small pieces sequentially by two blade portions, that is, the auxiliary blade portion and the main blade portion, it is possible that large-sized food is chopped into small pieces with a much less force than when chopped into small pieces at a time by the main blade portion in the related art. Thus, the advantage of preventing a malfunctioning and an error due to high load on a motor assembly or a blade assembly is provided.

Fourthly, according to the present disclosure, the auxiliary blade portion of the auxiliary blade is configured in such a manner to extend upward at a greater inclined angle than the main blade portion of the main blade. That is, the auxiliary blade portion is positioned at a greater height and more toward a central position than the main blade portion.

Therefore, a space where the food is positioned is provided between each of a plurality of the main blade portions. A large food lump is placed above the blade assembly and is chopped into small pieces by the auxiliary blade portion. The resulting pieces that fall below are subsequently chopped into smaller pieces by the main blade portion. That is, a lower portion of the large food lump is chopped into small pieces, and the resulting pieces are chopped into smaller pieces by the main blade portion. Thus, the advantage of easily chopping the large food lump into small pieces is provided.

Therefore, the auxiliary blade portion that extends upward at a predetermined inclined angle prevents the food from gathering around the center of the container body or whirls the food around the center thereof by chopping the food gathering around the center into small pieces. Thus, the effect of mixing the food well is achieved.

Fifthly, according to the present disclosure, an even number of main blade portions are provided in a manner that is symmetrical about the main fixation portion. Structurally, a plurality of main blade portions extend upward and downward at a predetermined inclined angle from the main fixation portion. Structurally, the auxiliary blade portion extends upward at a greater inclined angle therefrom. Therefore, a space where the blade portion of the blade assembly by which the food is chopped into small pieces is expanded to a lower portion or a center portion of the container body. Thus, the advantage of increasing the efficiency of chopping the food into small pieces is provided.

Sixthly, according to the present disclosure, a reinforcement portion is formed on edges of a sidewall and a bottom plate of a container body, the edges being brought into contact with each other. Thus, the advantage of preventing the food from sticking to a bottom surface of the container body is provided. That is, because the bottom surface of the container body is flat, and easy for the food to stick to the bottom surface thereof, and thus be fixed. However, the reinforcement portion interferes with the food of a predetermined size or greater. Thus, the food does not stick to the bottom surface of the container body because the reinforcement portion keeps the food in an inclined position.

Therefore, the food is prevented from sticking to the bottom surface of the container body, and thus a frictional force is prevented to cause resistance to the blade portions. Thus, the advantage of preventing damage to the blade and the motor assembly is provided.

In addition, the food does not stick to the bottom surface and is kept in an inclined position. Thus, the food is moves freely. Therefore, the food is kept rotated inside the container body. The effect of facilitating mixing of the food is also achieved.

Seventhly, according to the present disclosure, a fastening hole having a four-square cross-section is formed in respective center portions of the main blade and the auxiliary blade in a manner that passes through the respective center portions thereof from top to bottom. Furthermore, a fastening plate having a four-square external surface is provided on a blade shaft. Thus, the advantage of fastening the main blade and the auxiliary blade to the blade shaft without a separate additional mechanism in a manner that is rotatable together with the blade shaft is provided.

Eighthly, according to the present disclosure, a fixation cap is fastened by a bolt-nut mechanism to an upper end of the blade shaft, and thus the main blade and the auxiliary blade are prevented from deviating upward. Therefore, with the fastening and separation of the fixation cap by the bolt-nut mechanism, it is possible that the main blade and the auxiliary blade are fastened to each other at one time and are separated from each other at one time. Thus, the advantage of facilitating the replacing of the main blade and the auxiliary blade, and assembling and disassembling thereof are provided.

Ninthly, according to the present disclosure, a protrusion portion of the blade assembly that is exposed above the bottom surface of the container body has a tapered shape. An upper end portion of the fixation cap with which the main blade and the auxiliary blade are combined with the blade shaft has a dome shape. Therefore, the food on the blade assembly is prevented from sticking to the body and the fixation cap. Thus, the advantage of evenly mixing the food and chopping the food into small pieces is provided.

Eleventhly, according to the present disclosure, the auxiliary blade portion of the auxiliary blade is formed in such a manner to extend upward at a greater inclined angle than the main blade portion of the main blade. Therefore, the effect of rotating the food in the center inside a center portion of the container body, and thus mixing the food well is also achieved. That is, the auxiliary blade portion chops into pieces the food placed in the center portion other than a space where the main blade portion rotates. At the same time, the auxiliary blade portion serves to push the food placed in the center portion upward or sideways or serves to move the food placed in the center portion in a manner that is rotated. Thus, the effect of evenly mixing the food and chopping the food in small pieces is achieved.

DESCRIPTION OF DRAWINGS

FIG. 1 is a perspective view illustrating a blender according to a desired embodiment of the present disclosure;

FIG. 2 is a longitudinal cross-sectional view illustrating an internal configuration of the blender according to the embodiment of the present disclosure;

FIG. 3 is an exploded perspective view illustrating a detailed configuration of a container body that constitutes the blender according to an embodiment of the present disclosure;

FIG. 4 is a perspective view illustrating the container body that constitutes the blender according to the embodiment of the present disclosure, when viewed from below;

FIG. 5 is a perspective view illustrating a main body that constitutes the blender according to an embodiment of the present disclosure;

FIG. 6 is an exploded perspective view illustrating components in an upper half of the main body that constitutes the blender according to the embodiment of the present disclosure;

FIG. 7 is a perspective view illustrating a state where a cover is removed from the main body that constitutes the blender according to the embodiment of the present disclosure;

FIG. 8 is a perspective view illustrating an example of a container lid that constitutes the blender according to an embodiment of the present disclosure;

FIG. 9 is a cross-sectional perspective view illustrating an internal configuration of the container lid in FIG. 8;

FIG. 10 is an exploded perspective view illustrating a configuration of the container lid in FIG. 8 when viewed from above;

FIG. 11 is an exploded perspective view illustrating a configuration of the container lid in FIG. 8 when viewed from below;

FIG. 12 is an exploded cross-sectional perspective view illustrating an internal configuration of the container lid in FIG. 8;

FIG. 13 is an exploded perspective view illustrating a configuration of a container-lid body that constitutes the container lid in FIG. 8;

FIG. 14 is a perspective view illustrating a configuration of a blade assembly that constitutes the blender according to an embodiment of the present disclosure;

FIG. 15 is an exploded perspective view illustrating a detailed configuration of the blade assembly that constitutes the blender according to the embodiment of the present disclosure;

FIG. 16 is a plane view illustrating a state where the blade assembly is mounted inside an inner container body that constitutes the blender according to the embodiment of the present disclosure;

FIG. 17 is a longitudinal cross-sectional view illustrating the state where the blade assembly is mounted inside the inner container body that constitutes the blender according to the embodiment of the present disclosure;

FIG. 18 is a plane view illustrating a state where food is accommodated inside the inner container body that constitutes the blender according to the embodiment of the present disclosure;

FIG. 19 is a longitudinal cross-sectional view illustrating the state where the food is accommodated inside the inner container body that constitutes the blender according to the embodiment of the present disclosure.

DETAILED DESCRIPTION

A blender according to the present disclosure will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a perspective view illustrating a blender according to an embodiment of the present disclosure. FIG. 2 is a longitudinal cross-sectional view illustrating the blender to the embodiment of the present disclosure.

As illustrated in FIGS. 1 and 2, the blender according to the present disclosure is configured to include a container body 100, a main body 500, and the like. The container body 100 is positioned at a relatively great height and accommodates food. The main body 500 is provided underneath the container body 100 and supports the container body 100.

The food is accommodated to the container body 100 and is chopped into pieces or mixed there. The main body 500 supports the container body 100. A plurality of components that control food chopping and mixing in the container body 100, supply electric power, and perform other functions is provided inside the main body 500.

It is desirable that the entire container body 100 has the shape of a cylinder when viewed as a whole. The container body 100 is configured to be open at the top. Thus, the food may be inserted into and taken out of the container body 100.

It is desirable that the container body 100 is made of a transparent material in such a manner that the inside thereof may be viewed from the outside. That is, the container body 100 is made of glass or transparent plastic in such a manner that a user may visually check a state of the food inside the container body 100 from the outside.

A blade assembly 200 is mounted on the inside bottom of the container body 100. A plurality of blades is rotatably mounted in the blade assembly 200 and chops the food accommodated in the container body 100 into small pieces or mix the food.

The blade assembly 200 is configured in such a manner as to be connected to the motor assembly 600 described below and to be rotatable by a rotational force generated by the motor assembly 600.

It is desirable that the wall and the bottom of the container body 100 are formed in a double-layered manner. That is, the container body 100 is configured to include an outer container body 110 that provides an exterior appearance of the container body 100 and an inner container body 120 that is positioned inward from the outer container body 110. In a case where the outer container body 110 and the inner container body 120 are configured in such a manner as to be brought into contact with each other or in such a manner as to be spaced apart from each other, it is also possible that the outer container body 110 and the inner container body 120 are mounted in such a manner as to be partly brought into contact with each other.

One or more inner guides 122 that have a predetermined length in an upward-downward direction are provided inside the container body 100. The inner guide 122 serves to guide rotating of the food inside the container body 100. It is desirable that the inner guides 122 are symmetrically arranged in each pair in the forward-backward direction or in the leftward-rightward direction.

A handle 300 that is to be gripped with the user's hand is formed on a right-side surface of the container body 100 in a manner that protrudes rightward. It is desirable that the handle 300 is formed in such a manner that the user holds the handle 300 with their hand. According to the present disclosure, an example is illustrated where an upper end portion of the handle 300 is formed integrally with and is configured in such a manner as to be integrally combined with an upper end portion of an external surface of the container body 100.

A projection lip 102 is further formed on the upper portion of the external surface of the container body 100 in a manner that is opposite to the handle 300.

The projection lip 102, as illustrated, is formed on an upper portion of a left-side surface of the container body 100 and serves to guide discharging of the small pieces of the food inside the container body 100 in an easy manner to the outside. Therefore, it is desirable that the projection lip 102 is formed in such a manner that the nearer an upper end of the projection lip 210 is to the upper surface of the container body 100, the more the upper end thereof protrudes in the leftward direction.

The top of the container body 100 is covered by a container lid 400. That is, the container lid 400 is detachably mounted on the upper surface of the container body 100, and thus closes or opens the top of the container body 100.

The container lid 400 covers the top of the container body 100 in such a manner that the food does not get out of the container body 100 to the outside, and blocks an outside foreign material from being introduced into the container body 100.

The container lid 400 is configured in such a manner as to be attached on the upper surface of the container body 100 by the user pressing or rotating the container lid 400. A gasket 402 is further provided on an outer circumferential surface of the container lid 400 and bridges a gap between the container lid 400 and the container body 100. Of course, the gasket 402 also serves to press the container lid 400 against the upper surface of the container body 100 and thus hold the container lid 400 firmly in place.

A cap 450 is further provided on the container lid 400. That is, a cover hole 401 that is a circular hole of a predetermined size is formed in a center portion of the container lid 400 in a manner that passes through the center portion thereof from top to bottom. The cap 450 is inserted into the cover hole 401 and plugs the cover hole 401.

The cap 450, as illustrated, is mounted on the center portion of the container lid 400. The cap 450 is formed in such a manner as to have a smaller diameter than the container lid 400 when viewed as a whole. It is desirable that the cap 450 is detachably mounted on the container lid 400 by forcefully inserting the cap 450 thereinto or by rotating the cap 450.

According to the present disclosure, an example is illustrated where the cap 450 is detachably mounted on the container lid 400 by rotating the cap 450. A detailed configuration of the cap 450 is described as follows.

The cap 450 is detachably mounted on the container lid 400. Thus, the user may observe the food inside the container body 100 without the need to detach the container lid 400 in a state where only the cap 450 is detached from the container lid 400. After the cap 450 is detached, it is also possible that the food is inserted into the container body 100 or that the food inside the container body 100 is mixed using a rod or the like.

An upper end portion of the cap 450 is formed in such a manner as to protrude more upward than an upper end portion of the container lid 400. Thus, the upper end portion thereof may also serve as a container lid handle that is to be gripped by the user's hand when attaching or detaching the container lid 400.

As illustrated, the main body 500 is formed in such a manner as to have the shape of a parallelepiped when viewed as a whole. The main body 500 is provided underneath the container body 100 and supports the container body 100. A plurality of components including electronic components, such as the motor assembly 600 and a printed circuit board (PCB), is mounted inside the main body 500. Of course, the main body 500 may have an exterior appearance that can vary widely whenever necessary.

The motor assembly 600 is positioned inside a center portion of the main body 500. The motor assembly 600 is supplied with electric power from the outside, and thus generates a rotational force. The blades constituting the blade assembly 200 are rotated by the generated rotational force.

Therefore, it is desirable that a lower end of the blade assembly 200 is connected to an upper end portion of the motor assembly 600.

A knob 502 is formed on a front surface of the main body 500 in a manner that protrudes forward. The knob 502 serves to set the blender according to the present disclosure in operation. It is desirable that the knob 502 is rotatably mounted on the main body 500.

The knob 502 may also be configured in such a manner as to control a rotational speed of the motor assembly 600. That is, the knob 502 may be configured in such a manner that clockwise or counterclockwise rotation thereof changes the rotational speed of the motor assembly 600 from high to low or from low to high.

A touch operation unit 504 is provided on an upper surface of the main body 500.

The touch operation unit 504 serves to operate the blender according to the present disclosure via contact. It is desirable that the touch operation unit 504 is configured in such a manner as to perform operations, such as starting the blender and stopping the blender.

Of course, the knob 502 and the touch operation unit 504 may be configured in such a manner as to selectively perform a function of setting the blender and a function of operating the blender or in such a manner as to perform these two functions individually. That is, for convenience, according to the user's selection, one of the knob 502 and the touch operation unit 504 may be configured in such a manner as to perform the function of operating the blender or the function of setting the blender.

A display unit 506 is further provided adjacent to the touch operation unit 504 (to the left side of the touch operation unit 504 in FIG. 1). That is, the display unit 506 is further provided on the upper surface of the main body 500. The display unit 506 serves to display an operating state of the blender in such a manner as to be viewed by the user from the outside. Therefore, it is desirable that the display unit 506 is configured as a seven-segment display.

A cooling fan 610 is further provided below the motor assembly 600.

The cooling fan 610 is connected to a lower end portion of the motor assembly 600, and thus is rotated by the rotational force generated by the motor assembly 600. Accordingly, outside air is forced to be introduced into the main body 500. In this manner, the cooling fan 610 introduces air into the main body 500 from the outside. Thus, the cooling fan 610 serves to cool components, such as a PCB, that are provided inside the main body 500.

A base support 510 is further provided on a lower surface of the main body 500.

The base support 510 is formed in such a manner as to protrude downward from a bottom surface of the main body 500. A space of a predetermined size is formed inside the base support 510. A wireless electric power module 520 is accommodated in this space. The wireless electric power module 520 is supplied with electric power from the outside in a wireless manner that uses an induced electromotive force and serves to supply the electric power to the motor assembly 600 inside the main body 500.

A detection system is further provided in the main body 500, the container body 100, and the like. The detection system detects whether or not the container lid 400 is attached on the upper surface of the container body 100.

An electric circuit (not illustrated) capable of being turned on and off is provided on the container body 100. The electric circuit forms a closed circuit. Thus, it is desirable that the detection system is configured in such a manner as to detect whether electric current flows through the closed circuit by a voltage supplied from the main body 500.

More specifically, the detection system is configured to include an electric power transmission unit 700, an electric power reception unit 220, an opening and closing unit 230, a transparent electrode film 240, a detection unit 800, and the like. The electric power transmission unit 700 is provided in the main body 500 and supplies electric power to the container body 100. The electric power reception unit 220 is provided in the container body 100 and receives the electric power supplied from the electric power transmission unit 700. The opening and closing unit 230 is provided on an upper end portion of the container body 100 and opens and closes an electric circuit formed in the container body 100 according to whether or not the lid 400 covers the top of the container body 100. The transparent electrode film 240 is made of a transparent material and is provided on one surface of the container body 100. The transparent electrode film 240 is connected to the electric power reception unit 220 and the opening and closing unit 230 in a manner that allows electricity to flow therebetween. The detection unit 800 is provided on one side of the main body 500 or the container body 100 and detects whether or not electric current flows through a closed circuit formed by the electric circuit connected to the electric power reception unit 220 and the opening and closing unit 230.

The electric power transmission unit 700 serves to transfer the electric power supplied to the main body 500 from the outside of the main body 500 or the electric power pre-stored in the main body 500 itself to the container body 100. It is desirable that an induction coil or the like where an induced electromotive force can occur is used as the electric power transmission unit 700.

The electric power reception unit 220 serves to receive the electric power transmitted from the main body 500 and has a structure corresponding to that of the electric power transmission unit 700. That is, it is desirable that the electric power reception unit 220 is configured as a coil in such a manner that, by the induced electromotive force, the electric power is transferred between the electric power transmission unit 700 and the electric power reception unit 220.

It is desirable that the electric power transmission unit 700 and the electric power reception unit 220 are positioned adjacent to each other in such a manner as to generate the induced electromotive force. Therefore, according to the present disclosure, a case is illustrated where the electric power transmission unit 700 is mounted on an upper right end portion of the main body 500 and where the electric power reception unit 220 is mounted on a lower right end portion of the container body 100.

The turning-on and -off unit 230 serves to turn on and turn off the electric circuit (not illustrated) formed in the container body 100 according to whether or not the container lid 400 covers the top of the container body 100. The turning-on and -off unit 230 is configured to include a permanent magnet 232, and a reed switch 234 that are provided in the container lid 400 and the container body 100, respectively, and the like.

As illustrated in FIG. 2, according to the present disclosure, a case is illustrated where the permanent magnet 232 is mounted on a right edge of the container lid 400 and where the reed switch 234 is mounted on the upper end portion (a portion of the handle 300) of the container body 100.

More specifically, it is desirable that the reed switch 234 is mounted in such a manner as to be accommodated in a switch groove 236 formed in the upper end portion of the handle 300.

The reed switch consists of a pair of ferromagnetic flexible metal contacts in a hermetically sealed glass envelope. The contacts are open when a magnetic field is applied. The configuration of the reed switch is well known in the related art. Therefore, a further detailed description of the configuration and principle of the reed switch is omitted.

Of course, instead of the permanent magnet 232 and the reed switch 234, it is also possible that a different electric turning-on and -off unit or a mechanical structure is used, as the turning-on and -off unit 230, to turn on and off the electric circuit. It is also possible that the permanent magnet 232 and the reed switch 234 are mounted on the container lid 400 and the container body 100, respectively.

Various types of electric devices, various types of structures, or the like, if they have a function of being able to detect whether or not electric current flows by the turning-on and -off unit 230 through the electric circuit formed in the container body 100, may be used as the detection unit 800. According to the present disclosure, the detection unit 800 is described by taking, as an example, detection of light that uses a photosensor or photodetector.

Therefore, the detection unit 800 is configured to include an optical transmission module 810, an optical reception module 820, and the like. The optical transmission module 810 is provided in the container body 100 and generates light. The optical reception module 820 is provided in the main body 500 and receives the light transmitted by the optical transmission module 810.

It is desirable that the optical transmission module 810 and the optical reception module 820 are positioned adjacent to each other. According to the present disclosure, as illustrated, the optical transmission module 810 is positioned on a lower left end portion of the container body 100, and the optical reception module 820 is positioned on an upper left end portion of the main body 500.

It is desirable that a light emitting diode (LED) or the like that generates light using electricity is used as the optical transmission module 810. It is desirable that a photosensor, a photodetector, or the like that receives light and converts the received light into an electric signal is used as the optical reception module 820.

Then, the transparent electrode film 240 is provided between the outer container body 110 and the inner container body 120. More specifically, it is desirable that the transparent electrode film 240 is mounted on an internal surface of the outer container body 110.

The transparent electrode film 240 is made of a transparent material, such as indium-tin oxide (ITO), and is attached on a surface of the container body 100. The turning-on and -off unit 230 provided on the upper end portion of the container body 100 is also connected to the electric power reception unit 220 and the optical transmission module 810, which are provided on a lower end portion of the container body 100, thereby constituting the electric circuit.

In this manner, the transparent electrode film 240 is attached on the surface of the container body 100 made of a transparent material in a manner that extends longitudinally in the upward-downward direction. Thus, the transparent electrode film 240 serves to guide transfer of an electric signal between upper and lower end portions of the container body 100.

When the container body 100 and the transparent electrode film 240 are both made of a transparent material, the transparent electrode film 240 is not visually exposed to the outside. Thus, the transparent electrode film 240 does not spoil the exterior appearance of the container body 100, and a design of the container body 100 is maintained as is.

Then, in a case where the transparent electrode film 240 is attached on the surface of the container body 100, a hole may be formed in the transparent electrode film 240. The hole serves to remove a bubble occurring between the transparent electrode film 240 and the surface of the container body 100 on which the transparent electrode film 240 is attached. That is, in order to prevent the bubble from occurring, it is desirable that a hole is drilled through a center portion of the transparent electrode film 240 made of ITO in such a manner that the bubble escapes therethrough.

A seating support 900 is formed on the upper surface of the main body 500 in such a manner as to protrude upward therefrom.

The seating support 900 is formed to a circular shape that corresponds to a shape of the lower end portion of the container body 100. The lower end portion of the container body 100 is seated in the upward-downward direction on the seating support 900 in a manner that is removable therefrom.

The container body 100 is formed in a double-layered layer. That is, the container body 100 is configured to include the outer container body 110 and the inner container body 120. It is desirable that the inner guide 122 is formed in such a manner as to protrude inward from an internal surface of the inner container body 120.

A configuration of the container body 100 will be described in detail below.

FIG. 3 is an exploded perspective view illustrating a container body 100. FIG. 4 is a perspective view illustrating the container body 100, when viewed from below.

As illustrated in FIGS. 3 and 4, the container body 100 is formed to a cylindrical shape when viewed as a whole and is formed in a double-layered manner. That is, the container body 100 is configured to include the outer container body 110 that provides the exterior appearance of the container body 100 and the inner container body 120 that is positioned inward from the outer container body 110.

It is desirable that the container body 100, that is, the outer container body 110 and the inner container body 120 are made of a transparent material. That is, it is desirable that the outer container body 110 and the inner container body 120 are made of a transparent material, such as glass, polycyclohexylenedimethylene terephthalate (PCT), transparent plastic in such a manner that the user may visually check the state of the food inside the container body 100 from the outside.

The outer container body 110 provides the exterior appearance of the container body 100. It is desirable that the external container body 110 is formed to a cylindrical shape that has upper and lower portions of the same size. A main handle 302 is formed in such a manner as to protrude rightward from a right-side external surface of the outer container body 110. The main handle is to be gripped with the user's hand.

The main handle 302 is formed to the shape of “¬”. An upper end portion of the main handle 302 is connected to an upper right end portion of the outer container body 110. It is desirable that the main handle 302 is formed by injection molding in such a manner as to be integrally combined with the outer container body 110. In this manner, the main handle 302 has relatively more improved strength and durability in terms of an advantage when formed by injection molding in such a manner as to be integrally combined with the outer container body 110 than when jointed or fixed, as a separate single component, to the outer container body 110.

The switch groove 236 in which the reed switch 234 is accommodated is formed in a portion of the main handle 302 that is connected to the container body 100. That is, the switch groove 236 is formed in the upper end portion of the main handle 302 and provides a space in which the reed switch 234 is mounted. The switch groove 236 is open at the left side.

An exterior handle 304 and an internal handle 306 are further provided in such a manner as to extend outward from the main handle 302. That is, as illustrated, the exterior handle 304 is provided to the right side of the main handle 302, and the internal handle 306 is provided to the left side thereof.

More specifically, like the main handle 302, the exterior handle 304 is also formed to the shape of “¬” when viewed as a whole. The exterior handle 304 is formed in such a manner as to enclose an upper surface, a right-side surface, and front and rear surfaces of the main handle 302. It is desirable that the exterior handle 304 is made of a less-unbreakable antirust material having a smooth surface, such as a stainless steel material. This formation of the exterior handle 304 provides a visually aesthetic impression to a consumer.

The internal handle 306 encloses a left-side surface and a bottom surface of the main handle 302. The internal handle 306 is formed to the shape of “¬” that corresponds to a shape of the bottom surface of the main handle 302. It is desirable that at least one portion of the internal handle 306 is made of an elastic material.

Specifically, the internal handle 306 is configured to include a connection portion 306 a, a grip portion 306 b, and the like. The connection portion 306 a encloses a lower part of the upper end portion of the main handle 302. The grip portion 306 b is formed in such a manner as to extend downward from the connection portion 306 a and encloses the left-side surface of the main handle 302.

It is desirable that, like the external handle 304, the connection portion 306 a is made of a less-breakable material having a smooth surface. The grip portion 306 b is covered by the user's fingers. Thus, it is desirable that the grip portion 306 b is made of an elastic material. That is, it is desirable that the connection portion 306 a is made of a stainless material. The grip portion 306 b is covered by the user's four fingers (other than the thumb). Thus, it is desirable that grip portion 306 b is made of an elastic material, such as rubber, that provides a sense of smooth touch to the user.

The inner container body 120 is formed in such a manner as to have a smaller size (diameter) than the outer container body 110 and is seated inside the outer container body 110.

The inner container body 120 is formed to a cylindrical shape that is open at the top. More specifically, as illustrated, the nearer a cross section of the inner container body 120 is to the bottom, the more decreased a diameter thereof. That is, the inner container body 120 is formed in such a manner as to be tapered to the bottom.

A plurality of inner guides 122 as described above is formed in the upward-downward direction in an external surface of the inner container body 120. The blade assembly 200 and the like are mounted on a lower end portion of the inner container body 120.

The projection lip 102 is formed on an upper left end portion of the inner container body 120 in a manner that protrudes leftward. A covering container lid 124 is formed on an upper right end portion of the inner container body 120 in a manner that extends rightward.

The covering container lid 124 serves to cover the top of the switch groove 236 in the outer container body 110. The covering container lid 124 is formed to a plate that has a predetermined thickness. In order to correspond to a size of an upper end portion of the switch groove 236, the covering container lid 124 is formed in such a manner that the more a right end thereof protrudes rightward, the smaller a width thereof.

The blade assembly 200 is mounted on the lower end portion of the inner container body 120.

The blade assembly 200 serves to chop food into small pieces or mix food using the blades. The blade assembly 200 is configured in such a manner as to be rotated by the rotational force generated by the motor assembly 600. The blades and the like that chop the food into small pieces are mounted on a bottom surface of the inner container body 120 in a manner that protrudes upward therefrom.

A magnet holder 404 is further provided on the outer circumferential surface of the container lid 400. That is, as illustrated, the magnet holder 404 is formed in the outer circumferential surface of the container lid 400 in a manner that protrudes outward. The permanent magnet 232 is inserted into the magnet holder 404.

When the container lid 400 is attached on the upper surface of the container body 100 or detached therefrom, the permanent magnet 232 serves to perform control to turn on and off the reed switch 234.

A coil holder assembly is further provided between the outer container body 110 and the inner container body 120.

The coil holder assembly is configured to include a coil holder 130, an upper cover 140, a lower cover 150, and the like. An induction coil is provided on the coil holder 130. The upper cover 140 and the lower cover 150 enclose upper and lower portions, respectively, of the coil holder 130.

Specifically, the coil holder 130 is provided between a bottom surface of the outer container body 110 and a bottom surface of the inner container body 120. The electric power reception unit 220 and the optical transmission module 810 are mounted on the coil holder 130.

The coil holder 130 has the shape of a circular ring of a predetermined width when viewed as a whole. The electric power reception unit 220 is provided on a right end portion of the coil holder 130 in the shape of the circular ring. That is, although not illustrated in detail, the induction coil receiving electric power is provided on the right end portion of the coil holder 130 and constitutes the electric power reception unit 220.

The electric power reception unit 220 provided on the coil holder 130 is realized as a reception induction coil patterned in the same plane on a PCB. That is, in an implementation example of the electric power reception unit 220, the reception induction coil is wound a number of times in helical form on a reception core on the PCB on the bottom surface of the coil holder 130.

The optical transmission module 810 is provided on the bottom surface of the coil holder 130.

The optical transmission module 810 emits light by electricity supplied from the electric power reception unit 220 and constitutes the detection unit 800. As described above, it is desirable that an LED or the like is used as the optical transmission module 810.

The electric power reception unit 220 and the optical transmission module 810 are electrically connected to each other. That is, the electric power reception unit 220 and the optical transmission module 810 are formed in such a manner as to form a closed circuit along with the turning-on and -off unit 230 and the like. Therefore, it is desirable that the electric power reception unit 220, the optical transmission module 810, the turning-on and -off unit 230, and the like are configured in such a manner as to be electrically connected to each other by a printed circuit board or the like on the coil holder 130.

Although not illustrated, a conversion module that converts alternating current (AC) into direct current (DC) may be further provided on the coil holder 130.

A holder terminal 132 is provided on an upper surface of a right end portion of the coil holder 130.

A lower end portion of the transparent electrode film 240 is inserted into the holder terminal 132 for being connected thereto.

As illustrated, the coil holder 130 is formed to the shape of a ring when viewed as a whole. As illustrated, it is desirable that the coil holder 130 is formed in such a manner that the right end portion thereof has a relatively wide width so that the electric power reception unit 220 and the like are formed on the right end portion thereof.

A hole may be formed in outer and inner circumferential surfaces of the coil holder 130. A hook for fixing a plurality of components passes through the hole.

The coil holder 130 is protected by the upper and lower covers 140 and 150. The upper cover 140 and the lower cover 150 that correspond to upper and lower surfaces, respectively, of the coil holder 130 are provided over and under the coil holder 130, respectively and enclose upper and lower portions, respectively, of the coil holder 130.

A terminal holder 142 is formed on a right end portion of the upper cover 140 in a manner that protrudes upward. The holder terminal 132 of the coil holder 130 is accommodated in the terminal holder 142. Therefore, the holder terminal 132 is inserted, from below, into the terminal holder 142 for being accommodated therein. An upper portion of the terminal holder 142 is formed in such a manner as to be open at the part thereof. The lower end portion of the transparent electrode film 240 passes through the opening.

A hook may be formed on the upper cover 140. With the hook, the upper cover 140 is combined with the lower cover 150.

As described above, the transparent electrode film 240 is made of a transparent material, such as indium-tin oxide (ITO). The transparent electrode film 240 is configured in such a manner as to have a size corresponding to a length in the upward-downward direction of the container body 100.

The transparent electrode film 240 is provided between the outer container body 110 and the inner container body 120. In this manner, the presence of the transparent electrode film 240 between the outer container body 110 and the inner container body 120 prevents a contact with the food inside the inner container body 120 and blocks an outside foreign material from coming into contact with the outer container body 110 as well.

The transparent electrode film 240 may be attached on a surface of the outer container body 110 or may be attached on a surface of the inner container body 120. That is, the transparent electrode film 240 may be attached on the internal surface of the outer container body 110 or may be attached on an external surface (outer circumferential surface) of the inner container body 120.

A case where the transparent electrode film 240 is attached on the internal surface of the outer container body 110 in a manner that extends longitudinally in the upward-downward direction is described hereinafter as an example.

The transparent electrode film 240, as illustrated, is bent one or more times. A lower end portion thereof passes through the terminal holder 142 of the upper cover 140 and is connected to the holder terminal 132 of the coil holder 130, and an upper end portion thereof is connected to the reed switch 234.

That is, a film guide on which the transparent electrode film 240 is attached is formed on the internal surface of the outer container body 110 in a manner that extends longitudinally in the upward-downward direction. That is, the film guide is formed on an internal right-side surface of the outer container body 110 in a manner that extends longitudinally in the upward-downward direction, and thus guides attaching of the transparent electrode film 240.

A magnet groove 126 is formed in an upper end portion of the inner container body 120 in a manner that is cut outward. The permanent magnet 232 is accommodated in the magnet groove 126. That is, an end portion on the right side of the inner container body 120 is partly cut off rightward in such a manner as to be stepped, and thus the magnet groove 126 is formed. The permanent magnet 232 and the like are positioned in the magnet groove 126.

The container body 100 is formed in such a manner that a bottom surface thereof has a shape corresponding to a shape of the upper surface of the main body 500. With this configuration, the container body 100 is easily attached and detached on and from the upper surface of the main body 500.

More specifically, the container body 100 is seated on the seating support 900 of the main body 500 described below.

The container body 100 is formed in such a manner that the bottom surface thereof has a shape corresponding to a shape of an upper end portion of the main body 500. Thus, the container body 100 is seated on the main body 500 and is easily removed therefrom.

An edge rim 170 of a predetermined width is formed on the bottom surface of the container body 100 in a manner that protrudes downward. The edge rim 170 is brought into contact with an upper surface of a lower rim 910 of the seating support 900 on the main body 500. The edge rim 170 is formed to a shape corresponding to a shape of an upper surface of the lower rim 910. The lower rim 910 will be described below.

One part of a center portion of the bottom surface of the container body 100 is recessed in the upward direction, and thus an upper-rim accommodation groove 172 is formed. That is, the one part of the center portion of the bottom surface of the container body 100 is recessed in the upward direction inward from the edge rim 170 of the container body 100, and thus the upper-rim accommodation groove 172 is formed. When the container body 100 is seated on the main body 500, an upper rim 920 of the seating support 900 on the main body 500 is accommodated in the upper-rim accommodation groove 172. The upper rim 920 will be described below.

The edge rim 170 is formed to a shape of a circular ring that has an opening at one portion thereof. A coil seating part 940 described below is accommodated in this opening. That is, the edge rim 170 is open at the right ends, and thus a coil seating groove 170 a is formed. The coil seating part 940 described below is accommodated in the coil seating groove 170 a.

One part of the center portion of the bottom surface of the container body 100 protrudes downward, and thus a circular rim 174 is formed. That is, the center portion of the upper-rim accommodation groove 172 includes the circular rim 174 protruding downward.

As illustrated, the circular rim 174 has the shape of a circular ring. The circular rim 174 is open at the center. The circular rim 174 provides a path along which the blade assembly 200 and the motor assembly 600 may be connected to each other.

The circular rim 174 is accommodated in a circular-rim accommodation groove 980 formed in the main body 500. The circular-rim accommodation groove 980 will be described below.

A plurality of mounting protrusions 174 a that protrude radially is further provided on an outer circumferential surface of the circular rim 174. The mounting protrusion 174 a serves to hold the container body 100 firmly at its home position on the main body 500 and to keep the container body 100 stationary without being rotated. One or more mounting protrusions 174 a are provided.

According to the present disclosure, a case is illustrated where four mounting protrusions 174 a are provided. It is desirable that the mounting protrusion 174 a is formed in such a manner that the farther an end thereof extends outward from the outer circumferential surface of the circular rim 174, the more decreased a diameter thereof. The reason for this is to easily accommodate the mounting protrusion 174 a in the protrusion groove 982 described below.

FIGS. 5 to 7 are views each illustrating in detail components in an upper half of the main body 500. FIG. 5 is a perspective view illustrating the main body 500. FIG. 6 is an exploded perspective view illustrating the components in the upper half of the main body 500. FIG. 7 is a perspective view illustrating a state where a cover is removed from the main body 500.

As illustrated in FIGS. 5 to 7, the seating support 900 is provided on the upper surface of the main body 500 in a manner that protrudes upward to be stepped. The bottom of the container body 100 is seated on the seating support 900.

The lower end portion of the container body 100 is seated on the seating support 900 and is supported thereon. Therefore, it is desirable that the seating support 900 is formed in such a manner as to have a shape corresponding to a shape of the lower end portion of the container body 100.

Specifically, the seating support 900 is configured to include the lower rim 910, the upper rim 920, and the like. The lower rim 910 is formed in such a manner as to be stepped and has a diameter corresponding to a diameter of the lower end portion of the container body 100. The upper rim 920 is formed in such a manner as to protrude upward from the lower rim 910 and has a smaller diameter than the lower rim 910.

As illustrated, the lower rim 910 is formed in such a manner as to have a circular shape and a predetermined height. The upper rim 920 having a smaller diameter than the lower rim 910 is formed on the upper surface of the lower rim 910 in such a manner as to protrude upward therefrom to a predetermined height. Therefore, it is desirable that a step surface 902, like the upper surface of the main body 500, is in the horizontal plane formed between the lower rim 910 having a relatively great diameter and the upper rim 920 having a relatively small diameter.

An exterior ring 912 and an upper end ring 914 are provided on external surfaces, respectively, of the lower rim 910 and the upper rim 920. The exterior ring 912 and an upper end ring 914 have shapes corresponding to shapes, respectively, of the external surfaces of the lower rim 910 and the upper rim 920. The exterior ring 912 and the upper end ring 914 are provided on outer circumferential surfaces, respectively, of the lower rim 910 and the upper rim 920 that have a circular external surface, and thus enclose external surfaces (flank surfaces), respectively, of the lower rim 910 and the upper rim 920.

The exterior ring 912 and the upper end ring 914 serve to protect components inside and serve as an exterior material. Therefore, it is desirable that like the exterior handle 304, the exterior ring 912 and the upper end ring 914 are formed of an antirust material having a smooth surface, such as a stainless steel material.

An elastic member 930 made of an elastic material is further provided on the step surface 902 between the upper rim 920 and the lower rim 910. It is desirable that as illustrated, the elastic member 930 is formed in such a manner as to cover the step surface 902 formed on the upper surface of the lower rim 910 and to enclose a lower portion of the upper rim 920.

The elastic member 930 is made of an elastic material, and thus serves as a cushion that absorbs shock when the container body 100 is placed on the main body 500. That is, when the bottom surface of the container body 100 is brought into contact with the upper rim 920, the elastic member 930 also serves to prevent the upper rim 920 and the lower rim 910 on the main body 500, which are made of a solid material, and the bottom surface of the container body 100 from being damaged or from generating noise due to collision with each other.

In this manner, the elastic member 930, made of a material, such as rubber, is used to smoothly seat the container body 100 on the main body 500 without any shock. In addition, conductivity rubber may be used whenever necessary. In this case, conductivity rubber may also be provided on the bottom of the container body 100.

The electric power transmission unit 700 and the optical reception module 820 are mounted on an upper surface of the upper rim 920.

More specifically, a right-side surface of the upper rim 920 further protrudes rightward, and the coil seating part 940 is formed on the right-side surface thereof. The electric power transmission unit 700 is mounted on an upper surface of the coil seating part 940.

The electric power transmission unit 700 is positioned adjacent to the electric power reception unit 220 provided on the container body 100 and serves to supply electric power to the electric power reception unit 220. Therefore, it is desirable that the electric power transmission unit 700 is configured as an induction coil. That is, like the electric power reception unit 220, the electric power transmission unit 700 may be configured as an induction coil wound a number of times in helical form on a core (not illustrated) on the same surface and may be mounted on a PCB.

In addition, although not illustrated in detail, an oscillation circuit unit may be provided inside the main body 500. The oscillation circuit unit may generate electric power and may apply electric current to the electric power transmission unit 700. A magnetic field may be produced by the electric current applied to the electric power transmission unit 700. Then, the oscillation circuit unit may change strength of the electric current that is applied to the electric power transmission unit 700, and the change in the strength of the electric current changes the magnetic field in the electric power transmission unit 700.

Therefore, according to the present disclosure, when the electric power reception unit 220 and the electric power transmission unit 700 are mounted in such a manner as to correspond to each other in the upward-downward direction, the strength of the electric current that is applied to the electric power transmission unit 700 is changed, and the magnetic field in the electric power transmission unit 700 is accordingly changed. Thus, inductive coupling between the electric power transmission unit 700 and the electric power reception unit 220 changes magnetic flux passing through the electric power reception unit 220. Consequently, an induced electromotive force develops in the electric power reception unit 220. This induced electromotive force may also be supplied to the optical transmission module 810.

The optical reception module 820 is provided in a direction opposite to a direction of the electric power transmission unit 700. That is, it is desirable that the optical reception module 820 is provided in a reception groove 822 formed in an upper surface of a left end portion of the upper rim 920. The reception groove 822 is positioned in a manner that corresponds in the upward-downward direction to the optical transmission module 810 mounted on the container body 100.

More specifically, the reception groove 822 of a predetermined size is formed in the upper surface of the left end portion of the upper rim 920 in a manner that is cut downward. The optical reception module 820 is fixedly mounted in the reception groove 822.

It is desirable that the optical reception module 820, as described above, includes a photosensor or photodetector. The optical reception module 820 may receive light transmitted by the optical transmission module 810 and may transmit this received optical signal.

A Hall sensor 950 and a container body detection switch 960 may be further provided on the upper surface of the upper rim 920. That is, a container body switch groove 962 and a sensor groove 952 are formed in upper surfaces, respectively, of leading and rear edge portions of the upper rim 920 in a manner that is cut downward. The container body detection switch 960 and the Hall sensor 950 are fixedly mounted in the container body switch groove 962 and the sensor groove 952, respectively.

The container body detection switch 960 is configured as a reed switch and serves to detect whether or not the container body 100 is seated on the upper surface of the main body 500. In a case where the container body detection switch 960 is mounted, a magnet (not illustrated) corresponding to the container body detection switch 960 is also further provided on the lower end portion of the container body 100.

The Hall sensor 950 serves to determine a type of the container body 100 seated on the main body 500. In this case, a signal transfer unit that corresponds to the bottom surface of the container body 100 may also be necessary.

The upper end ring 914 is mounted an edge of the upper rim 920. It is desirable that the upper end ring 914 is configured in such a manner as to be separated into two pieces. That is, as illustrated, the right-side surface of the upper rim 920 protrudes rightward, and thus the coil seating part 940 is formed. Therefore, the upper end ring 914 is configured to include a protrusion piece 916 and a curvature piece 918. The protrusion piece 916 encloses an external surface of the coil seating part 940. The curvature piece 918 encloses portions other than the external surface thereof.

An upper portion of the upper rim 920 is covered by a cover 970. Therefore, the electric power transmission unit 700, the optical reception module 820, the container body detection switch 960, the Hall sensor 950, and the like that are mounted on the upper rim 920 are covered by the cover 970 for being protected.

A center portion of the seating support 900 is open at the top and bottom. Thus, the blade assembly 200 of the container body 100 and the motor assembly 600 built into the main body 500 are connected to each other.

More specifically, the circular-rim accommodation groove 980 is formed in a center portion of the upper rim 920 in a manner that is cut downward. The above-described circular rim 174 on a lower end of the container body 100 is accommodated in the circular-rim accommodation groove 980. That is, the upper rim 920 has the shape of a circular ring when viewed as a whole. The circular-rim accommodation groove 980 in the shape of a circle is formed in the center portion of the upper rim 920.

One or more protrusion grooves 982 are formed in an internal surface of the upper rim 920. One or more portions of the protrusion groove 982 are recessed outward, and thus one or more circular-rim accommodation grooves 980 are radially formed. The mounting protrusion 174 a of the container body 100 is seated in the circular-rim accommodation groove 982.

Therefore, it is desirable that the protrusion grooves 982 are formed in such a manner that the number or sizes thereof correspond to the number or sizes of the mounting protrusions 174 a and that the protrusion groove 982 is formed in such a manner that a size thereof corresponds to a size of the mounting protrusion 174 a. It is desirable that the protrusion groove 982 is formed in such a manner as to have the same width as or a greater width than the mounting protrusions 174 a.

FIGS. 8 to 13 each illustrate a detailed configuration of the container lid 400. FIG. 8 is a perspective view illustrating the container lid 400. FIG. 9 is a cross-sectional perspective view illustrating the container lid 400. FIG. 10 is an exploded perspective view illustrating the container lid 400 when viewed from above. FIG. 11 is an exploded perspective view illustrating the container lid 400 when viewed from below. FIG. 0.12 is an exploded cross-sectional perspective view illustrating the container lid 400. FIG. 13 is an exploded perspective view illustrating a container-lid body 410 of the container lid 400.

As illustrated in FIGS. 8 to 13, the container lid 400 is configured to include the container-lid body 410, the cap 450, a fastening portion 440, and the like. The cover hole 401 is formed in the container-lid body 410 in a manner that passes through the container-lid body 410 from top to bottom. The cap 450 opens and closes the cover hole 401. With the fastening portion 440, the cap 450 is detachably mounted on the container-lid body 410.

Specifically, the container-lid body 410 is formed in such a manner as to have the shape of a circular ring. The cover hole 401 is formed in a center portion of the container-lid body 410 in a manner that passes through the center portion thereof from top to bottom. The cap 450 is detachably mounted in the cover hole 401 and closes and opens the cover hole 401.

The container-lid body 410 is configured to include a cover casing 420, a cover exterior material 430, and the like. The cover hole 401 is formed in a center portion of the cover casing 420 in a manner that passes through the center portion thereof from top to bottom. The cover exterior material 430 encloses a flank surface of the cover casing 420.

A plurality of slit ribs 420 a is formed in the flank surface of the cover casing 420 in a manner that protrudes outward therefrom. With the plurality of slit ribs 420, the cover exterior material 430 and the cover casing 420 are combinable with each other.

The slit ribs 420 a are provided in pairs. A slit that is a gap of a predetermined size is formed between a pair of slit ribs 420 a. An adhesive, such as silicone, or an elastic material is dispensed on the slit or is provided to fill the slit. It is desirable that the cover exterior material 430 and the cover casing 420 are configured in such a manner as to be combined with each other using the adhesive or the elastic material.

Of course, the slit rib 420 a protrudes outward from the flank surface of the cover casing 420. Therefore, it is also possible that the cover case 420 is forced to be inserted into the cover exterior material 430 for being combined therewith.

The cover casing 420 provides an exterior appearance of the container-lid body 410 and an overall frame thereof. The cover hole 401 is formed in the center portion of the cover casing 420 in a manner that has a predetermined diameter and passes through the center portion thereof from top to bottom.

Then, the cover casing 420 is inserted into the cover exterior material 430 for being combined therewith. The exterior material 430 provides a good-quality and aesthetically pleasing exterior appearance to a user. That is, the cover casing 420 may be made of a plastic material or the like by injection molding or the like. It is desirable that the cover exterior material 430 is made of a stainless material or the like.

That is, it is desirable that the cover exterior material 430 is made of an antirust material having a smooth surface, such as a stainless steel material.

The cover exterior material 430 may be attached on an outer circumferential surface (flank surface) of the cover casing 420 using an adhesive or the like. The cover casing 420 is forced to be inserted into the cover exterior material 430 for being combined therewith. Therefore, as illustrated, it is desirable that the slit ribs 420 a are formed in an equally spaced manner on the outer circumferential surface (flank surface) of the cover casing 420 in such a manner as to protrude outward from the outer circumferential surface thereof.

The cover casing 420 is configured to include an outer wall 422, an inner wall 424, an upper circular plate 426, and the like. The outer wall 422 is formed in such a manner as to have the shape of a circular ring and provides an exterior appearance of the cover casing 420. The inner wall 424 is formed in such a manner as to have a smaller diameter than the outer wall 422 and to have the cover hole 401 in the center thereof. The upper circular plate 426 connects respective upper ends of the outer wall 422 and the inner wall 424 to each other.

Specifically, the cover casing 420 is formed to a shape of a circular ring of a predetermined width that is closed at the top, when viewed as a whole. That is, the cover casing 420 is formed in the cover hole 401 in a manner that passes through the center portion thereof from top to bottom. The cover casing 420 is closed at the top, and thus has a circular-ring structure that has a longitudinal cross-sectional area in the shape of “∩”.

The container lid 400 serves to cover the top of the container body 100. The cover hole 401 is formed in the center portion of the container lid 400 in a manner that passes through the center portion thereof from top to bottom. The cap 450 is detachably mounted in the cover hole 401. That is, as illustrated, the cover hole 401 is formed in the center portion of the container lid 400 in a manner that passes through the center portion thereof from top to bottom. The cover hole 401 is opened and closed by the cap 450.

The gasket 402 and a support ring 412 are further provided on a lateral side of the container-lid body 410. The gasket 402 bridges the gap between the container lid 400 and the container body 100. The support ring 412 fixedly supports the gasket 402.

In this manner, the support ring 412 and the gasket 402 that have the shape of a circular ring are provided on a lower portion of the container-lid body 410. The support ring 412 may be fixed to the lower portion of the container-lid body 410 using an adhesive or the like. The gasket 402 is brought into contact with an external surface of the support ring 412 for being fixed thereto.

More specifically, the support ring 412 is fixedly combined with a lower portion of the outer wall 422, and the gasket 402 is brought into contact with the external surface of the support ring 412 for being mounted thereon.

A support groove 412 a is formed in the external surface of the support ring 412 in a manner that is cut inward. The gasket 402 is accommodated in the support groove 412 a for being fastened thereto.

The gasket 402 serves to bridge the gap between the container lid 400 and the container body 100 and, at the same time, serves to prevent the container lid 400 attached to the container body 100 from being of itself separated from the container body 100.

Therefore, the gasket 402 may be made of an elastic material. As illustrated, a plurality of concave-convex portions may be formed on an outer circumferential surface of the gasket 402.

The cap 450 is configured to include an upper surface plate 452, a cap body 454, and the like. The upper surface plate 452 is exposed to the outside at the upper surface of the container-lid body 410. At least one portion of the cap body 454 is accommodated in the cover hole 401.

The cap body 454, as illustrated, is formed to a shape of a truncated cone or a cylinder that has an empty space inside when viewed as a whole. That is, it is desirable that the cap body 454 is formed to a shape of a truncated cone that is tapered to the top, or to a shape of a cylinder that has the same diameter at the top and bottom.

The upper surface plate 452 opens and closes the tip of the cap body 454. As illustrated, the upper surface plate 452 is formed in such a manner as to have a greater diameter than an end portion of the cap body 454.

An intermediate ring 456 is further formed on the cap body 454 in such a manner as to protrude outward therefrom. The intermediate ring 456 is brought into contact with an internal surface of an upper end portion of the cover hole 401.

Specifically, the intermediate ring 456 may be formed in such a manner as to protrude outward from a center portion or an upper portion of the cap body 454. When the cap 450 is mounted on the container-lid body 410, the intermediate ring 456 lies in the same plane with the upper circular plate 426. Therefore, an upper surface of the intermediate ring 456 is exposed to the outside at the top of the container-lid body 410.

A ventilation groove 456 a is further formed in an outer circumferential surface of the intermediate ring 456 in a manner that is cut inward. Thus, it is possible that air flows through the intermediate ring 456 in the upward-downward direction. That is, the ventilation groove 456 a serves to allow air to flow through the intermediate ring 456 on the cap 450 in the upward-downward direction. As illustrated, the ventilation groove 456 a is formed in a manner that is cut inward from the outer circumferential surface of the intermediate ring 456.

A seating groove 424 a is formed on an upper end portion of the inner wall 424. An edge of the intermediate ring 456 is seated in the seating groove 424 a. That is, as illustrated, the seating groove 424 a is formed in an upper end portion of an internal surface of the inner wall 424 in such a manner as to be stepped. The seating groove 424 a is formed in a manner that is cut outward.

It is desirable that an inner circumferential surface of the seating groove 424 a is formed in such a manner as to correspond to an outer circumferential surface of the intermediate ring 456 or to have a larger size than the outer circumferential surface thereof. An internal diameter of the upper end portion of the inner wall 424 is smaller than an external diameter of the intermediate ring 456. Therefore, the intermediate ring 456 is seated in the seating groove 424 a, and thus is supported on the seating groove 424 a without falling below the inner wall 424.

As illustrated, the outer wall 422 may be formed in such a manner as to have a height corresponding to a height of the inner wall 424 or may be formed in such a manner as to have a greater or smaller height than the inner wall 424.

The fastening unit 440 is configured to include a fastening protrusion 442, a fastening passage 444, and the like. The fastening protrusion 442 is formed on the container-lid body 410 in a manner that protrudes therefrom in one direction. The fastening passage 444 is formed in the cap 450. The fastening protrusion 442 is accommodated in the fastening passage 444. That is, the fastening unit 440 is configured to include the fastening protrusion 442 that protrudes inward from an inner circumferential surface of the container-lid body 410, the fastening passage 444 that is formed in a manner that is cut inward from an outer circumferential surface of the cap 450, and the like. The fastening protrusion 442 is moved or accommodated in the fastening passage 444.

Respective structures of and respective formation positions of the fastening protrusion 442 and the fastening passage 444 will be described in more detail below.

The fastening protrusion 442 is formed on the inner wall 424 in a manner that protrudes inward therefrom. That is, it is desirable that the fastening protrusion 442 is formed in such a manner as to be arranged a predetermined distance upward from a lower end portion of the inner wall 424.

More specifically, a close-contact plate 424 b is further formed on the internal surface of the inner wall 424 in a manner that protrudes inward from the internal surface thereof. The close-contact plate 424 b is brought into contact with an external surface of the cap body 454. That is, a lower end portion of the cap body 454 is formed in a manner that protrudes partly more inward, and thus the close-contact plate 424 b is formed. A plurality of close-contact plates 424 b may be formed on the cap body 454. According to the present disclosure, a case is illustrated where two close-contact plates 424 b is formed on the cap body 454 symmetrically in the forward-backward direction or in the leftward-rightward direction.

The fastening protrusion 442 is formed on the close-contact plate 424 b in a manner that protrudes inward therefrom. That is, as illustrated, the fastening protrusion 442 is formed on the close-contact plate 424 b in a manner that protrudes inward (toward the center of the container lid 400) therefrom. The fastening protrusion 442 is formed in such a manner as to be positioned a predetermined distance upward from a lower end portion of the close-contact plate 424 b.

It is desirable that a distance that the fastening protrusion 442 is arranged upward from the lower end portion of the cap body 454 or the close-contact plate 424 b corresponds to a length in the upward-downward direction of an access groove 444 a in the cap 450 described below.

Of course, it is also possible that the fastening protrusion 442 is formed, for example, on the internal surface of the inner wall 424 instead of on the close-contact plate 424 b. Since the close-contact plate 424 b further protrudes inward from the inner wall 424, the protruding fastening protrusion 442 has a greater thickness when formed on the internal surface of the inner wall 424 other than the close-contact plate 424 b than when formed on the close-contact plate 424 b.

The fastening protrusions 442 are formed at positions, respectively, that correspond to positions of the fastening passages 444. Therefore, one or more the fastening protrusions 442 may be formed on the inner wall 424 or the close-contact plate 424 b. According to an embodiment of the present disclosure, a case is illustrated where two fastening protrusions 442 are formed on the inner wall 424 or the close-contact plate 424 b in such a manner as to face each other at symmetrical positions.

A return groove 424 c is further provided in the close-contact plate 424 b. The return groove 424 c is formed in a manner that is cut more outward than the close-contact plate 424 b and serves as a path along which food on the close-contact plate 424 b falls under. That is, two close-contact plates 424 b are formed separately at symmetrical positions, respectively, on a lower portion of the inner wall 424. The return groove 424 c is formed between these two close-contact plates 424 b.

The return groove 424 c is formed in a manner that is cut more outward than the close-contact plate 424 b. Thus, the return groove 424 c is open at the top and bottom. Therefore, in a state where the cap 450 is fastened to the container-lid body 410, in a case where the food in the container body 100 spills onto the close-contact plate 424 b, the food falls under through the return groove 424 c back into the container body 100.

A return guide 424 d is further provided on one end portion of the close-contact plate 424 b. The return guide 424 d is formed in such a manner that, the more the return guide 424 d protrudes in one direction, the more decreased a height of an upper end thereof. The return guide 424 d serves to guide moving of the food on the close-contact plate 424 b toward the return groove 424 c.

Specifically, the return guide 424 d is formed on opposite end portions of the close-contact plate 424 b or any one of the right or left end portions thereof in such a manner that, the more the return guide 424 d protrudes leftward or rightward, the more the return guide 424 d is inclined downward and the more decreased the height of the upper end thereof. Therefore, the food positioned on the close-contact plate 424 b slides into the return groove 424 c along the return guide 424 d. Then, the food falls into the container body 100 below through the return groove 424 c.

The fastening passage 444 is formed in the outer circumferential surface of the cap 450. The fastening passage 444 not only provides a path along which the fastening protrusion 442 moves, but also keeps the fastening protrusion 442 accommodated. Thus, the cap 450 is combined with the container-lid body 410.

The fastening passage 444 is configured to include the access groove 444 a, a fastening groove 444 b, and the like. The access groove 444 a is formed in a manner that is cut inward from the outer circumferential surface of the cap 450. The access groove 444 a guides moving of the fastening protrusion 442 in the upward-downward direction. The fastening groove 444 b is formed in such a manner as to horizontally extend from one end portion of the access groove 444 a. The fastening grooves 444 b provides a space in which the fastening protrusion 442 is accommodated.

Specifically, when a pair of fastening passages 444 are formed in an outer circumferential surface of the lower end portion of the cap body 454, it is desirable that the same number of the fastening passages 444 are formed as the fastening protrusions 442.

As illustrated, the access groove 444 a is formed in such a manner as to extend upward from the lower end portion of the cap body 454. The access groove 444 a is formed in such a manner as to extend a predetermined distance upward from an internal surface of the lower end portion of the cap body 454. That is, it is desirable that a length in the upward-downward direction of the access groove 444 a corresponds to a distance from a lower end of the internal wall 424 to the fastening protrusion 442.

The fastening groove 444 b is formed in such a manner as to vertically extend leftward or leftward from an upper end portion of the access groove 444 a. That is, the access groove 444 a is formed in such a manner as to vertically extend in the upward-downward direction, and the fastening groove 444 b is formed in such a manner as to horizontally extend in the leftward-rightward direction. Therefore, an upper end portion of the access groove 444 a and a left end portion or a right end portion of the fastening groove 444 b are connected to each other, and thus the fastening protrusion 442 is able to move in a state of being accommodated in the access groove 444 a and the fastening groove 444 b.

A prevention protrusion 446 is formed on the fastening groove 444 b in a manner that protrudes outward therefrom. The prevention protrusion 446 prevents separation of the fastening protrusion 442 accommodated in the fastening groove 444 b. That is, as illustrated, the prevention protrusion 446 of a predetermined size is formed on the fastening groove 444 b in a manner that protrudes outward therefrom.

It is desirable that the prevention protrusion 446 is formed in a manner that intersects the fastening groove 444 b in the upward-downward direction. It is desirable that the prevention protrusion 446 is formed in such a manner that a length of the protruding prevention protrusion 446 is smaller than a depth of the fastening groove 444 b.

It is desirable that the prevention protrusion 446 is formed adjacent to the end portion of the fastening groove 444 b. FIG. 11 illustrates a case where the prevention protrusion 446 is formed adjacent to the right end portion of the fastening groove 444 b.

One portion of an inner circumferential surface of the cap body 454 may further protrude inward. Thus, a reinforcement portion 454 a may be formed. That is, in a case where an opposite side (internal surface) of the cap body 454, in which the fastening passage 444 is formed, further protrudes inward and where the fastening passage 444 is formed in an outer circumferential surface of the cap body 454, it is also desirable that the cap body 454 maintain a predetermined thickness.

FIGS. 14 and 15 each illustrate a configuration of the blade assembly 200. That is, FIG. 14 is a perspective view illustrating the blade assembly 200, and FIG. 15 is an exploded perspective view illustrating the blade assembly 200.

As illustrated in FIGS. 14 and 15, the blade assembly 200 is configured to include a main blade 250, an auxiliary blade 252, a blade shaft 260, a body 270, a fixation cap 280, and the like. The main blade 250 includes a plurality of main blade portions 250 b. The auxiliary blade 252 includes auxiliary blade portions 252 b, each being positioned between each of the plurality of main blade portions 250 b. The main blade 250 and the auxiliary blade 252 rotate about the blade shaft 260. The body 270 is mounted on the lower end portion of the container body 100 and rotatably supports the blade shaft 260. The fixation cap 280 is fastened to the blade shaft 260 and serves to fix the main blade 250 and the auxiliary blade 252 to the blade shaft 260.

The blade assembly 200 serves to chop food into small pieces or to mix the food using the blades. These blades that chop the food into small pieces include the main blade 250 and the auxiliary blade 252.

The main blade 250 primarily serves to chop the food into small pieces. The auxiliary blade 252 serves to assist the main blade 250 in easily chopping the food into smaller pieces and mixing the food.

The main blade 250 is configured to include a main fixation portion 250 a, the plurality of blade portions 250 b, and the like. The main fixation portion 250 a is combined with the blade shaft 260. The plurality of blade portions 250 b are formed in a manner that protrudes outward from the main fixation portion 250 a.

As illustrated, the main fixation portion 250 a is formed in such a manner as to constitute a center portion of the main blade 250. The main fixation portion 250 a is combined with the blade shaft 260 and supports the plurality of main blade portions 250 b that are formed integrally into one piece in a manner that protrudes outward from the main fixation portion 250 a.

Four main blade portions 250 b are formed in a manner that protrudes radially from the main fixation portion 250 a. The four main blade portions 250 b are symmetrically formed in such a manner as to be equiangular with respect to the center of the main fixation portion 250 a.

Specifically, as illustrated, the main fixation portion 250 a of a predetermined size having the shape of a flat plate is formed on a center portion of the main blade 250. The four main blade portions 250 b are formed integrally into one piece in a manner that protrudes outward from the main fixation portion 250 a.

It is desirable that an even number of main blade portions 250 b are provided. It is desirable that the main blade portions 250 b are formed in such a manner as to be symmetrical about the blade shaft 260 in the forward-backward direction or the leftward-rightward direction.

According to the present disclosure, a case is illustrated where four main blade portions 250 b are provided. Of course, it is also possible that three or five main blade portions 250 b are formed in such a manner as to be equiangular with respect to the center of the main fixation portion 250 a. That is, it is also possible that an even number of main blade portions 250 b are provided.

The main blade portion 250 b is formed in such a manner as to be in parallel with the main fixation portion 250 a or in such a manner as to make a predetermined angle with the main fixation portion 250 a.

Specifically, the main blade portion 250 b is formed in a manner that extends horizontally outward from an end of the main fixation portion 250 a or in a manner that extends upward or downward at a predetermined inclined angle from the end of the main fixation portion 250 a.

According to the present disclosure, as illustrated in FIGS. 14 and 15, among the total four main blade portions 250 b, two main blade portions 250 b in the leftward-rightward direction are formed in such a manner as to be horizontal with the main fixation portion 250 a, and two main blade portions 250 b in the forward-backward direction extend upward at a predetermined inclined angle from front and rear ends, respectively, of the main fixation portion 250 a.

In addition to this configuration, the main blade portion 250 b may extend downward at a predetermined inclined angle from the main fixation portion 250 a (refer to FIG. 17).

In addition, in FIGS. 14 and 15, the main blade portions 250 b are configured in such a manner as to be symmetrical in the forward-backward direction or the leftward-rightward direction about the main fixation portion 250 a. However, it is also possible that the main blade portions 250 b are configured in such a manner as not to be symmetrical in the forward-backward direction or the leftward-rightward direction about the main fixation portion 250 a.

For example, it is possible that two main blade portions 250 b are all formed on the left and right sides, respectively, of the main fixation portion 250 a in such a manner as to extend horizontally or to extend at predetermined inclined angles in the upward-downward direction. In addition, it is also possible that two main blade portions 250 b are formed on the left and right sides, respectively, of the main fixation portion 250 a in such a manner as to extend in opposite directions at predetermined inclined angles. That is, it is possible that one main blade portion 250 b of a pair of main blade portions 250 b is formed on the left side of the main fixation portion 250 a in such a manner as to extend downward at a predetermined inclined angle and that the other main blade portion 250 b is formed on the right side of the main fixation portion 250 a in such a manner as to extend upward at a predetermined inclined angle (refer to FIG. 17).

The auxiliary blade 252 is configured to include an auxiliary fixation portion 252 a, a plurality of auxiliary blade portions 252 b, and the like. The auxiliary fixation portion 252 a is combined with the blade shaft 260, and the plurality of auxiliary blade portions 252 b is formed in such a manner as to protrude outside from the auxiliary fixation portion 252 a.

As illustrated, the auxiliary fixation portion 252 a constitutes a center portion of the auxiliary blade 252 and is combined with the blade shaft 260. The auxiliary fixation portion 252 a supports one or more auxiliary blade portions 252 b that are formed integrally into one piece in a manner that protrudes outward from the auxiliary fixation portion 252 a.

It is desirable that a smaller number of the auxiliary blade portions 252 b are provided than the main blade portions 250 b. It is desirable that the auxiliary blade portions 252 b has a smaller length than the main blade portion 250 b.

Of course, it is also possible that the number of the provided auxiliary blade portions 252 b is the same as the number of the provided main blade portions 250 b or that the auxiliary blade portion 252 b has the same size as the main blade portion 250 b. According to the present disclosure, the auxiliary blade portion 252 b is formed in such a manner as to be smaller in number than the main blade portion 250 b or in such a manner as to have a smaller size than the main blade portion 250 b. For this reason, the auxiliary blade portion 252 b will be described taking as an example a function of assisting the main blade portion 250 b in chopping the food into smaller spaces.

It is also desirable that an even number of the auxiliary blade portions 252 b are provided. That is, as illustrated, it is desirable that two auxiliary blade portions 252 b are provided in such a manner as to extend upward at a predetermined inclined angle from both ends, respectively, of the auxiliary fixation portion 252 a. As is the case with the main blade portion 250 b, four auxiliary blade portions 252 b may be provided depending on the situation.

According to the present disclosure, as illustrated, a case is illustrated where two auxiliary blade portions 252 b are formed in such a manner as to protrude symmetrically outward from the auxiliary fixation portion 252 a.

The auxiliary blade portion 252 b is formed in such a manner as to extend upward at a predetermined inclined angle from an end of the auxiliary fixation portion 252 a. Thus, the auxiliary blade portion 252 b makes the predetermined angle with the auxiliary fixation portion 252 a.

Then, it is desirable that an angle that the auxiliary blade portion 252 b and the auxiliary fixation portion 252 a make with each other is smaller than an angle that the main blade portion 250 b and the main fixation portion 250 a make with each other.

Specifically, the auxiliary blade portion 252 b extends upward at a greater inclined angle than the main blade portion 250 b. That is, it is desirable that an angle that the auxiliary blade portion 252 b and an upper surface of the auxiliary fixation portion 252 a make with each other is smaller than the angle that the main blade portion 250 b and the main fixation portion 250 a make with each other.

Accordingly, the auxiliary blade 252 serves to assist the main blade 250 in chopping the food into smaller pieces and at the same time control moving of the food inside a center portion of the container body 100. That is, the auxiliary blade portion 252 b of the auxiliary blade 252 is positioned in the center portion of the container body 100, and thus this positioning is also effective in mixing the food inside the container body 100 by rotation.

Specifically, the auxiliary blade portion 252 b partially chops the food lying on a center portion other than a space in which the main blade portion 250 b operates. At the same time, the auxiliary blade portion 252 b also serves to push the food lying on the center portion upward or outward or to rotate the food lying thereon, thereby moving the food toward the main blade portion 250 b, upward, or in other directions.

In this manner, the main blade 250 primarily serves to move the food accommodated in the container body 100 and at the same time to chop the food into small pieces, and the auxiliary blade 252 serves to assist the main blade 250 in chopping the food on the center portion of the container body 100 into smaller pieces and at the same time to move the food thereon.

The auxiliary blade portion 252 b is mounted in such a manner as to be positioned between each of the plurality of main blade portions 250 b. That is, the plurality of main blade portions 250 b is mounted in such a manner that an angle that the main blade portion makes with respect to the center of the main fixation portion 250 a is 90° and in such a manner as to be equally spaced. The auxiliary blade portion 252 b is positioned between each of the main blade portions 250 b.

Accordingly, when the main blade portion 250 b cannot touch the food, the auxiliary blade portion 252 b may touch the food. Thus, the efficiency of chopping the food into small pieces and mixing the food can be increased.

A fastening hole 254 is formed in respective center portions of the main blade 250 and the auxiliary blade 252 in a manner that passes through the respective center portions thereof from top to bottom. A fastening plate 264 described below is accommodated in the fastening hole 254. That is, the fastening hole 254 is formed in each of the center portions of the main fixation portion 250 a of the main blade 250 and the center portion of the auxiliary fixation portion 252 a of the auxiliary blade 252 in a manner that passes through from top to bottom.

The fastening hole 254 is formed in such a manner as to have a shape corresponding to a shape of an external surface of the fastening plate 264 described below. Thus, with this configuration, rotation of the blade shaft 260 rotates the main blade 250 and the auxiliary blade 252.

Therefore, as illustrated, it is desirable that the fastening hole 254 is formed in such a manner as to have a four-square cross-section.

The body 270 is configured to include a seating portion 272, a protrusion portion 274, and the like. The seating portion 272 is fixedly mounted on the bottom surface of the container body 100. The protrusion portion 274 is formed on an upper surface of the seating portion 272 and is exposed in a manner that protrudes upward from the bottom surface of the container body 100.

As illustrated, the seating portion 272 is formed in such a manner as to have the shape of a cylinder when viewed as a whole, and thus is mounted on the bottom surface of the container body 100. Therefore, it is desirable that a key pocket 272 a is further formed in at least one surface of the seating portion 272. A portion of the bottom surface of the container body 100 is inserted into the key pocket 272 a from bottom to top, and thus the body 270 is prevented from being rotated. That is, the key pocket 272 a is further formed in the seating portion 272, and a portion of the bottom surface of the container body 100 is inserted into the key pocket 272 a, thereby holding the body 270 in place.

Specifically, the body 270 needs to be stationary without being rotated in a state of being mounted in the container body 100 when the blade shaft 260 is rotated. For this reason, the key pocket 272 a into which a portion of the bottom surface of the container body 100 is to be inserted is formed.

The key pocket 272 a is cut inward from an external surface of the seating portion 272 in such a manner as to have a flat bottom. The key pocket 272 a is brought into contact with a corresponding surface (not illustrated) of the container body 100, thereby preventing the rotation of the body 270.

As illustrated, the key pocket 272 a is formed to a shape of a flat groove that is open at the bottom. It is desirable that key pockets 272 a are formed in a pair in such a manner as to be symmetrical in the leftward-rightward direction. Therefore, the body 270 is held in place in a state where a portion of the bottom surface of the container body 100 is inserted into the key pocket 272 a from bottom to top.

As illustrated, a protrusion portion 274 is formed on the upper surface of the seating portion 272. Then, the protrusion portion 274 is formed in such a manner that a lower end portion thereof has a greater external diameter than the seating portion 272.

Therefore, when the body 270 is mounted on the bottom surface of the container body 100, the external diameter of the lower end portion of the protrusion portion 274 is greater than an internal diameter of a body insertion hole (not illustrated) that is formed on the bottom surface of the container body 100 in a manner that passes through the bottom surface thereof from top to bottom. The protrusion portion 274 is exposed in a manner that protrudes upward from a bottom surface of in the inner container body 100.

As illustrated, it is desirable that the protrusion portion 274 is tapered to the top, and thus an external diameter thereof gradually decreases in the upward direction.

The blade shaft 260 is formed in such a manner as to have a predetermined length in the upward-downward direction and is mounted in such a manner as to pass through an internal center portion of the body 270.

Then, the blade shaft 260 is rotatably mounted inside the body 270. Therefore, although not illustrated, it is desirable that a bearing is mounted inside the body 270. The bearing allows the blade shaft 260 to be rotated in a state of being inserted.

A connection portion 262 is provided on a lower end portion of the blade shaft 260. The connection portion 262 moves in conjunction with the motor assembly 600, and thus serves to transfer the rotational force generated by the motor assembly 600.

As illustrated, it is desirable that the connection portion 262 is configured as a spline shaft having a cross section in a concave-convex shape. Therefore, although not illustrated, it is desirable that a corresponding spline boss is provided on an upper-end connection portion of the motor assembly 600 that is combined with the connection portion 262.

The fastening plate 264 and a fastening shank 266 are provided on an upper end of the blade shaft 260. The main blade 250 and the auxiliary blade 252 are mounted on the fastening plate 264. The fixation cap 280 is fastened to the fastening shank 266.

Specifically, the fastening shank 266 with which the fixation cap 280 is to be combined is formed on the upper end of the blade shaft 260. The fastening plate 264 is provided underneath the fastening shank 266.

As illustrated, it is desirable that the fastening plate 264 is formed in such a manner as to have a smaller external diameter than the blade shaft 260 accommodated in body 270.

Therefore, the main blade 250 and the auxiliary blade 252 no longer moves down in a state of being mounted on the fastening plate 264. Thus, the main blade 250 and the auxiliary blade may be rotated without respective bottom surfaces thereof interfering with an upper surface of the body 270.

The main blade 250 and the auxiliary blade 252, along with the blade shaft 260, are rotated in a state of being mounted on the fastening plate 264.

Therefore, it is desirable that an external surface of the fastening plate 264 has a shape corresponding to an internal diameter of the fastening hole 254. That is, the fastening hole 254 formed in the main blade 250 and the auxiliary blade 252 has a four-square cross section. Thus, when the external surface of the fastening plate 264 has a size and a shape corresponding to a size and a shape of the fastening hole 254, the main blade 250 and the auxiliary blade 252, along with the blade shaft 260, are rotatable in a state of being mounted on the fastening plate 264 without a separate fixation mechanism.

In this manner, it is desirable that a flat cross-section of the fastening plate 264 has a four-square shape corresponding to a shape of the fastening hole 254. The fastening plate 264 needs to have an external surface that is smaller than an internal surface of the fastening hole 254 in such a manner that the fastening plate 264 is accommodated in the fastening hole 254. The fastening plate 264 needs to be formed in such a manner that a length of a diagonal of the flat cross-section thereof is greater than a distance between surfaces facing each other in the fastening hole 254. Thus, the main blade 250 and the auxiliary blade 252 are not allowed to be rotated in a state of being fastened to the fastening plate 264.

The fixation cap 280 is fastened to the upper end of the blade shaft 260. The main blade 250 and the auxiliary blade 252 are mounted on the blade shaft 260, and thus are kept held in place without deviating upward.

The fixation cap 280 is configured to include a nut portion 282, a cap portion 284, and the like. The nut portion 282 is combined with the fastening shank 266. The cap portion 284 protrudes upward from an upper surface of the nut portion 282 in a manner that has the shape of a dome.

It is desirable that the fixation cap 280 is fastened by a bolt-nut mechanism to the fastening shank 266. The nut portion 282 is tapped, and the fastening shank 266 is threaded.

The cap portion 284 is formed to a shape of a dome that is a hemispherical roof. The cap portion 284 is formed integrally with the nut portion 282. The cap portion 284 may serve to prevent the food or a foreign material from permeating into a hole underneath the cap portion 284 that is formed on the center portion of the nut portion 282 and may serve to guide sliding of the food without coming into contact with an upper surface thereof and being fixed to the upper surface.

FIG. 16 is a plane view illustrating a state where the blade assembly 200 is mounted on the inner container body 120. FIG. 17 is a longitudinal cross-sectional view illustrating the state where the blade assembly 200 is mounted on the inner container body 100.

As illustrated in FIGS. 16 and 17, the inner container body 120 is configured to include a sidewall 100 a, a bottom plate 100 b, and the like. The sidewall 100 a has a circular flat cross section. The bottom plate is connected to a lower surface of the sidewall 100 a.

The blade assembly 200 is mounted on lower end portions of the outer container body 110 and the inner container body 120. As illustrated, the main blade 250 and the auxiliary blade 252 are mounted in such a manner as to be positioned inside the inner container body 120.

More specifically, the protrusion portion 274 constituting the body 270 of the blade assembly 200, the fixation cap 280, the main blade 250, and the auxiliary blade 252 are mounted in such a manner as to protrude upward from the bottom plate 100 b of the inner container body 120 to be exposed.

The protrusion portion 274 is kept fixed to the bottom plate 100 b of the inner container body 120, and the main blade 250 and the auxiliary blade 252 are rotated together with the blade shaft 260.

A reinforcement portion 100 c is further formed on edges of the sidewall 100 a and the bottom plate 100 b of the inner container body 120, the edges being brought into contact with each other. That is, a corner space of a predetermined size is formed between the edge of the sidewall 100 a and the edge of the bottom plate 100 b that are brought into contact with each other. The sidewall 100 a is cylinder-shaped or is tapered so that a diameter thereof gradually increases going toward the top thereof. The bottom plate 100 b is in the horizontal plane. The reinforcement portion 100 c is filled into this corner space.

Therefore, an internal surface of the reinforcement portion 100 c, as illustrated, is an inclined surface that is inclined at a predetermined slope angle. An internal surface of the reinforcement portion 100 c is inclined at a smaller slope angle than the sidewall 100 a.

In this manner, the reinforcement portion 100 c is formed to a shape that has an internal diameter which gradually decreases going toward a bottom thereof. The reinforcement portion 100 c is inclined at a predetermined slope angle. Therefore, this shape of the reinforcement portion 100 c serves to reduce an area of the bottom plate 100 b or the sidewall 100 a with which a food lump comes into contact.

That is, since the reinforcement portion 100 c is filled into the corner space between the edges of the sidewall 100 a and the bottom plate 100 b in the inner container body 120 that are brought into contact with each other, the area of the bottom plate 100 b that is flatly formed is relatively decreased. Thus, the area of the bottom plate 100 b with which the food lump comes into contact is reduced. Alternatively, the reinforcement portion 100 c interferes with one end portion of the bottom plate 100 b, and thus the one end portion thereof is kept in an inclined position.

Operation of the blender according to the present disclosure that has the configuration as described above will be described below with reference to the accompanying drawings.

The container body 100 is seated on the main body 500 as illustrated in FIG. 1. In this state, the blender according to the present disclosure is ready for use.

First, electric power needs to be supplied from the outside in order to use the blender. It is also possible that the wireless electric power module 520 supplies the electric power in a wireless manner. That is, it is possible that the electric power is supplied from the outside using an induced electromotive force. Of course, it is also possible that the electric power is supplied in a wired manner.

The wireless electric power module 520 supplies the electric power to components, such as the motor assembly 600, the touch operation unit 504, and the electric power transmission unit 700, that need the electric power for operating. The user may operate the blender or may stop the blender by operating the touch operation unit 504 or the knob 502.

For example, when the user operates the touch operation unit 504 or the knob 502, the motor assembly 600 operates, the blades of the blade assembly 200 are rotated, and then food is chopped into small pieces.

At this time, the detection system determines whether or not the container lid 400 is attached. In a case where the container lid 400 is not attached, the motor assembly 600 and the blade assembly 200 do not operate.

Specifically, the reed switch 234 is turned off when the blender is not in use. Therefore, the electric power reception unit 220, the reed switch 234, the optical transmission module 810, and the like do not form a closed circuit within the container body 100, and thus light reception does not occur in the optical reception module 820.

In this manner, when the light reception does not occur in the optical reception module 820, with no signal representing the non-occurrence of the light reception, the motor assembly 600 is blocked from receiving electric power.

When the container lid 400 is attached in this state, the permanent magnet 232 of the container lid 400 is positioned in proximity to the reed switch 234, and thus the reed switch 234 is turned on. In return, the electric power reception unit 220, the reed switch 234, the optical transmission module 810, and the like form the closed circuit. Accordingly, the optical reception module 820 receives light that occurs in the optical transmission module 810.

Thus, when it is detected that the container lid 400 is attached, the motor assembly 600 starts to operate according to the user's operation. The food inside the container body 100 is chopped into small pieces. Of course, at this time, it is desirable that the container body detection switch 960 or the like also detects whether or not the container body 100 is mounted on the main body 500 and thus that the motor assembly 600 starts to operate.

At this time, an operating state of the blender according to the present disclosure is displayed on the display unit 506 or the like for being viewed from the outside. Thus, the user may visually recognize the operating state, operation time, and the like of the blender.

When attaching or detaching the container lid 400 on and from the container body 100, the user attaches or detaches the container lid 400 while holding an upper portion of the cap 450 with their hand. The user presses the container lid 400 in a direction of motion from upward to downward, and thus the container lid 400 is brought into contact with the upper surface of the container body 100 and thus is fixed thereto. At this time, the gasket 402 provided on an external surface of the container lid 400 bridges a gap between the container lid 400 and the container body 100.

When with the operation of each of the motor assembly 600 and the blade assembly 200, an operation of chopping food inside the container body 100 into small pieces or an operation of mixing food inside the container body 100 is finished according to the user's intention, the user may lift the container body 100 upward from the main body 500 for being separated therefrom and then may detach the container lid 400 to take the food out of the container body 100.

In addition, the user may separate the cap 450 mounted on the center portion of the container lid 400 from the center portion thereof. The user may perform this separation operation by rotating the cap 450, and thus moving the cap 450 upward while holding the upper end portion thereof with their hand.

When the cap 450 is separated from the container lid body 410, the user may place food into the container body 100 through the cover hole 401 or may stir the food inside the container body 100 using a rod or the like.

The blade edge of the blade assembly 200 is configured to include the main blade 250 and the auxiliary blade 252. With this configuration, it is easier to chop food into small pieces.

FIG. 18 is a plane view illustrating a state where the food inside the inner container body 120 is chopped into small pieces by the main blade 250 and the auxiliary blade 252. FIG. 19 is a longitudinal cross-sectional view illustrating the state where the food inside the inner container body 120 is chopped into small pieces by the main blade 250 and the auxiliary blade 252.

As illustrated in FIGS. 18 and 19, when a food lump F of a predetermined size or larger is introduced into the inner container body 120, a bottom of the food lump F does not come into contact with the bottom plate 100 b because the reinforcement portion 100 c is formed on the edge of the bottom plate 100 b of the inner container body 120.

In this manner, the bottom of the food lump F does not come into contact with the bottom surface of the inner container body 120, and the reinforcement portion 100 c interferes with an edge of the bottom of the food lump F. Accordingly, moving of the food lump F is facilitated, and thus the rotation of the main blade 250 facilitates the chopping of the food lump F into small pieces.

The auxiliary blade portion 252 b of the auxiliary blade 252 is positioned between each of the main blade portions 250 b. Thus, the food lump F of the predetermined size placed between the main blade portions 250 b first comes into contact with the auxiliary blade portion 252 b. Accordingly, one portion of the food lump F is chopped into small pieces, or cuts are made on the food lump F.

The food lump F of which one portion is chopped into small pieces by the auxiliary blade portion 252 b is sequentially chopped into small pieces by the rotations of the main blade 250 and the auxiliary blade 252, and then by the main blade portion 250 b.

In this manner, the food lump F of which one portion is first chopped into small pieces by the auxiliary blade portion 252 b is further chopped into smaller pieces or mixed by the main blade portion 250 b. Thus, it is possible that a large-sized food lump is easily chopped into small pieces or mixed. Accordingly, malfunctioning of a motor occurs less frequently, and a load on the motor can be reduced.

The present disclosure is not limited to the embodiments described above. It would be apparent to a person of ordinary skill in the art that various modifications will be made to the embodiments of the present disclosure without departing the scope of the present disclosure. 

1-10. (canceled)
 11. A blender comprising: a container body in which food is accommodated; a main body to support the container body; a container lid to detachably mount on an upper surface of the container body to open and close a top of the container body; and a blade assembly disposed at a lower end portion of the container body to chop the food inside the container body into small pieces, wherein the blade assembly comprises: a main blade on which a plurality of main blade portions are disposed; and an auxiliary blade of which at least one auxiliary blade portion disposed thereof is positioned between the plurality of main blade portions.
 12. The blender of claim 11, wherein the auxiliary blade portion has a smaller length than the main blade portion.
 13. The blender of claim 11, wherein a smaller number of auxiliary blade portions are provided than a number of the main blade portions.
 14. The blender of claim 11, wherein the main blade comprises: a main fixation portion combined with a blade shaft; and the plurality of main blade portions disposed at the main fixation portion in such a manner as to protrude outward therefrom, and wherein the auxiliary blade comprises: an auxiliary fixation portion combined with the blade shaft; and the at least one auxiliary blade portion including a plurality of auxiliary blade portions disposed at the auxiliary fixation portion in such a manner as to protrude outward therefrom.
 15. The blender of claim 14, wherein an even number of the main blade portions and an even number of the auxiliary blade portions are provided.
 16. The blender of claim 15, wherein the plurality of main blade portions include four main blade portions disposed at the main fixation portion in such a manner as to protrude radially therefrom, and the plurality of auxiliary blade portions include two auxiliary blade portions disposed at the auxiliary main portion in such a manner as to protrude outward therefrom symmetrically with respect to each other.
 17. The blender of claim 14, wherein a main blade portion among the plurality of main blade portions is disposed at the main fixation portion in such a manner as to be in parallel with the main fixation portion.
 18. The blender of claim 14, wherein a main blade portion among the plurality of main blade portions is disposed at the main fixation portion in such a manner as to make an angle with the main fixation portion.
 19. The blender of claim 18, wherein the main blade portion is bent upward with respect to the main fixation portion.
 20. The blender of claim 18, wherein the main blade portion is bent downward with respect to the main fixation portion.
 21. The blender of claim 14, wherein an auxiliary blade portion among the plurality of auxiliary blade portions is disposed at the auxiliary fixation portion in such a manner as to make an inclined angle upward with the auxiliary fixation portion.
 22. The blender of claim 14, wherein an angle of an auxiliary blade portion among the plurality of auxiliary blade portions with the auxiliary fixation portion is smaller than an angle of a main blade portion among the plurality of the main blade portions with the main fixation portion.
 23. The blender of claim 16, wherein two of the four main blade portions facing each other protrude upwardly from the main fixation portion, and other two of the four main blade portions facing each other protrude parallelly from the main fixation portion.
 24. The blender of claim 16, wherein among two of the four main blade portions facing each other, one main blade portion protrudes upwardly from the main fixation portion and other of the main blade portion protrudes downwardly from the main fixation portion, and other two of the four main blade portions facing each other protrude parallelly from the main fixation portion.
 25. The blender of claim 16, wherein each of the two auxiliary blade portions protrude from the auxiliary fixation portion between respective two main blade portions and is bent upward greater than the four main blade portions.
 26. The blender of claim 11, wherein the container body comprises: a sidewall having a circular flat cross section, a bottom plate connected to a lower surface of the sidewall, and a reinforcement portion disposed at edges of the sidewall and the bottom plate, the edges being brought into contact with each other.
 27. The blender of claim 19, wherein an internal surface of the reinforcement portion is an inclined surface that is inclined at a predetermined slope angle. 